公开(公告)号：US20230381768A1

公开(公告)日：2023-11-30

申请号：US18307060

申请日：2023-04-26

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Yusaku ONOCHI ,  Masakazu AOKI ,  Mitsuru MATSUMOTO ,  Takuto HIROSE

IPC: B01J37/14 ,  B01J23/755 ,  C07C1/12

CPC classification number: B01J37/14 ,  B01J23/755 ,  C07C1/12 ,  C07C2523/755

Abstract: Provided is a methanation catalyst processing method capable of suppressing degradation of a catalyst performance. A methanation catalyst processing method of the present disclosure includes oxidizing nickel through a heat treatment of a methanation catalyst by supplying an oxygen gas containing oxygen to a reactor, the reactor housing the methanation catalyst containing the nickel as a catalyst component. In the oxidizing, the oxygen gas is supplied to the reactor such that the oxygen is supplied to 1 g of the methanation catalyst at a supply rate in a range of from 0.0213 mmol-O2/sec·g-cat. to 0.0638 mmol-O2/sec·g-cat., and a time period of the heat treatment of the methanation catalyst by supplying the oxygen gas to the reactor is set to 30 minutes or more.

公开(公告)号：US20220331783A1

公开(公告)日：2022-10-20

申请号：US17716354

申请日：2022-04-08

Applicant: TOYOTA JIDOSHA KABUSHIKI KAISHA

Inventor： Masashi KIKUGAWA ,  Yoshihiro GOTO ,  Haruo IMAGAWA ,  Mitsuru MATSUMOTO ,  Akinori SATOU ,  Marie ISHIKAWA ,  Tetsuya NAMBA ,  Hideyuki MATSUMOTO

IPC: B01J23/46 ,  B01J23/10 ,  C01C1/04

Abstract: An ammonia synthesis catalyst, includes a composite oxide carrier in which at least one additive metal element selected from the group consisting of titanium (Ti), zirconium (Zr), hafnium (Hf), aluminum (Al), gallium (Ga), indium (In), silicon (Si), germanium (Ge), and tin (Sn) is solid-solutionized in a composite oxide containing cerium (Ce) and a lanthanide other than Ce and having a composition represented by the following formula: CexA1−x−yByOd (in the formula, A represents a lanthanide other than Ce, B represents the additive metal element, x represents a molar fraction of Ce, y represents a molar fraction of the additive metal element, 1−x−y represents a molar fraction of a lanthanide other than Ce, x and y satisfy 0.1≤x≤0.9, 0.01≤y≤0.3, and 0.11≤x+y≤0.91, d represents a molar ratio of oxygen atoms, and 1.5≤d≤2 is satisfied); and ruthenium (Ru) supported on the composite oxide carrier.